1

Entergy Gulf States, Inc. (Louisiana)

Proposed Transmission Reliability Projects

Entergy Transmission Planning Summit

New Orleans, LA

July 8, 2004

2

2003-04

Harelson

Weiner

Coly-Loblolly-Hammond Line Construction

Carryover:

Build parallel line

3

Coly-Loblolly-Hammond Line Construction

Loblolly FairgroundsColy Hammond

69 kV

230 kV

To Lockhart 69 kV

To Polyform 69 kV69 kV

230 kV

Phase II: Install 230\69 kV auto from Harelson

Phase I: Build at 230 kV and operate at 69 kV

To Vignes 230 kV

To Jaguar 230 kV

To Moler 230 kV

To French Settlement 230 kV

To Ponchatoula 230 kV

To Independence 115 kV

Phase II: Build Loblolly-Hammond 230 kV

Phase I: $3.62 MM with ISD 2004

Phase II: $11.4 MM with ISD 2007See ELI-South Presentation for Phase II details

2003-04

4

2005-06 EGSI-LA Transmission Reliability ProjectsMcManus 69 kV:

Capacitor Bank Addition

ASI Improvement Plan:Conway-Panama (2005 ISD) CarryoverColy-Vignes (2006 ISD)SEE ELI Presentation

Loblolly-Hammond:Build 230kV line2007 ISD Est. Cost: $3 MM (R.O.W.)SEE ELI Presentation

Jefferson Davis Parish 69 kV System Improvement Plan

69 kV Jackson- MarydaleLine Upgrade

69 kV Lafayette-Holiday Line Upgrade

69 kV Coly-Denham Springs: Upgrade Line

138 kV Port Hudson-Crown Zellerbach Line upgrade: Phase 2

138 kV Moril-Hopkins: Construct new line

138 kV Nelson-Mossville: Upgrade line

5

138 kV Line 368 Port Hudson-Crown Zellerbach:

Upgrade Line

2004-05

Scenario• The 138 kV substations Star Hill, Crown Zellerbach, and Repapco in East Baton Rouge

and East Feliciana Parishes are served by 2-230/138 kV autotransformers located at Port Hudson substation. This industrial loop serves approximately 207 MVA with the Repapco cogeneration out-of-service.

• Under peak loading conditions, loss of the Repapco-Port Hudson line can potentially overload Line 368 (Port Hudson-Crown Zellerbach) by as much as 25% in 2004, that portion of line composed of 795 AA and rated at 174 MVA

Recommended Solution• Complete 2nd phase of reconductoring 7.5 miles of Line 368 with a conductor capable of

at least 301 MVA or 1,260 A.

• Estimated Cost: $5.5 MM

6

138kV Line 368 Port Hudson-Crown Zellerbach2005

Phase 1

Phase 2

7

69kV Jackson-Marydale:Upgrade Line

Scenario

• The 69 kV system serving loads north of Baton Rouge in East and West Feliciana Parishes is supported by two 69 kV lines out of Port Hudson substation. This is a rural service area with long distances between substations on two divergent radial circuits. This 69 kV system will serve approximately 70 MW in summer 2004 and 71 MW in 2005.

• Loss of Port Hudson to Sandy Creek to Jackson or Francis to Grant to Port Hudson will overload Jackson-Marydale by 17%.

Recommended Solution

• Replace 5.89 miles of existing 1/0 ACSR conductor with 336 ACSR. Replace all structures and conductor as needed. The reconductor will increase line capacity from 33 MVA to 69 MVA.

• Estimated Cost: $1.43 MM

2006

8

69 kV Jackson-Marydale

9

McManus 69kV Substation: Replace Cap Bank & Correct Load Power Factor

Scenario:

• McManus 69 kV Substation is located north of Baton Rouge in East Feliciana Parish near the end of a 12 mile radial 69 kV line. There will be approximately 70 MW of load in the area in 2005.

• Loss of Port Hudson to Jackson 69 kV will cause voltages less than 90% at multiple substations in East Feliciana Parish.

Recommended Solution:

• Install a 6 MVAr capacitor bank at McManus substation for contingencies only. The existing 18 MVAR bank at McManus should be on-line during summer peak.

• Estimated Cost: $550 K

2006

10

McManus 69kV Substation

11

69 kV Coly-Denham Springs:Upgrade Line

Scenario

• There is approximately 67 MW of load on the affected 69 kV transmission line.

• For the loss of Gloria-Harelson 69 kV line, the Coly-Polyform-Denham Springs line overloads by 12% in summer 2005.

Recommended Solution:

• Replace 4.37 miles of a mix of 500 Cu, 1033 AA, and 1024 ACAR with twin bundle 666 ACSR or conductor rated at least 180 MVA (1,500 amps).

• Estimated cost: $2.1 MM

2005-06

12

69 kV Coly-Denham Springs Line 759

Reconductor line

Harelson

13

Jefferson Davis Parish69 kV System Improvement Plan

Scenario:• The 69 kV transmission system between Jennings and Chlomal substations will serve

approximately 85 MW of load including the radial from Lawtag substation in 2005. The main "trunk" of these systems are the contiguous segments comprising of Line 13 (Jennings-Compton-Elton), Line 16 (Elton-Tupper-Serpent-Carter), and Line 11 (Carter-Lacassine-Chlomal).

• As an indication of load growth in this area, a new 25 MVA transformer was added in 2004 at Lacassine Substation.

• Splices have been used to make repairs and they are beginning to fail. The current loading can potentially cause the 69kV lines to sag into the distribution underbuild that is located along most of these lines. Upgrading these lines is needed to address safety and reliability concerns.

2006-08

14

Existing Configuration of Lines 11, 12, 13, 14

Station with Breaker

Non-Breaker Station

LEGEND

Station with Proposed Breakers

Radial to Winn/Potter/Thornwell/ TexLake

Chlomal Iowa Derouen

Lacassine

Carter

Serpent Tupper

Elton

Compton

Roanoke

Lawtag

Robbie

Jennings

Welsh

Normally-OpenedL11 L13

L16

L13A

L12L14

15

Contingency Overload/Undervoltage

Loss of Jennings-Lawtag Chlomal-Iowa 20%

Loss of Elton-Jennings Chlomal-Lacassine 28%

LC Bulk-Chlomal 6%

Loss of Chlomal-Carter Compton-Jennings 5%

Loss of Lawtag-Jennings Robbie, Winn, Texlake

Potter < 0.915 p.u.

Loss of Richard-Nelson 500 Lawtag-Jennings 22%

• Recommended Solution:Phase I: Upgrade 3.07 miles of 795 AA from Lake Charles Bulk to Chlomal. Upgrade 4.78

miles 4/0 CU from Jennings-Lawtag with a conductor rated at least 101 MVA of capacity. Install breaker at Lacassine.

Phase II Upgrade 12.36 miles 1/0 ACSR of Chlomal-Lacassine to a conductor with at least 101 MVA of capacity. Install a 9MVAR capacitor at Winn Substation.

• Estimated cost: Phase I $3.7 MM

Phase II $6.3 MM

Jefferson Davis Parish69 kV System Improvement Plan

16

Phase II Install cap bank at Winn Substation

Phase I Upgrade Line

Phase II Upgrade Line

Phase I Upgrade Line

Jefferson Davis Parish69 kV System Improvement Plan

17

69 kV Lafayette-Holiday: Upgrade LineScenario:

• There is approximately 141 MW of load in the area. Lafayette-Holiday-Billeaud line is currently rated at 39 MVA. In fall 2002, a breaker was installed at Billeaud, a normally-opened point, allowing it to be normally-closed. In summer 2007, Lafayette-Holiday is expected to load to 101% under normal operations.

• Loss of Moril 138/69 kV auto causes a 19% overload and loss of Moril-New Iberia 69 kV line causes an overload of 14% on Lafayette-Holiday in Summer 2005.

Recommended Solution:

• Replace 4.89 miles of 1- 4/0 Cu with 1-336 ACSR or conductor that achieves at least 68 MVA (or 569 amps) capacity.

• Estimated Cost: $2.23 MM

2005-06

18

69 kV Lafayette-Holiday Line Upgrade

Line Upgrade

19

138 kV Moril-Hopkins (Cleco):Construct Parallel Line

Scenario

• The Iberia and Vermillion Parish area’s 69 kV transmission system is served from Scott Bulk (via Richard 138 kV lines) and the two 138 kV tie-lines (Moril-Hopkins and Ivanhoe-Bayou Warehouse) with CLECO. The area load is approximately 168 MW.

• For the loss of Moril-Hopkins, Duboin-Bayou Warehouse overloads by 13%.

Recommended Solution

• Build new parallel line from Moril to Hopkins 2.56 miles with a conductor that achieves at least 290 MVA (1,205 amps) capacity.

• Estimated cost: $2.5 MM

Note: Requires joint planning with CLECO

20

138 kV Moril-Hopkins (Cleco)

Overloaded Line

HOPKINS (CLECO)

Build Parallel Line

21

138 kV Nelson-Mossville:Upgrade Line

Scenario:

• The 138 kV transmission system in the Lake Charles area serves large industrial loads and commercial & residential loads. The affected area load is approximately 200 MW.

– For the loss of Carlyss-Citicon West, Nelson-Mossville overloads by 3% in 2005 and 6% in summer 2006.

Recommended Solution:

• Reconductor 3.28 miles of 1-1033 AA with conductor with at least 333 MVA capacity or 1,590 ACSR.

• Estimated cost: $1.7 MM

22

138 kV Nelson-Mossville

Upgrade Line 274

23

2007-08 EGSI-LA Transmission Expansion Projects

Gloria-Harelson Line Upgrade

Alchem-Monochem Line Upgrade: 2008 ISD

Scott-Carencro Line Upgrade: 2007 ISD

Scott-Judice-Meaux Line Upgrade: 2008 ISD

Richard-Colonial Academy Line Upgrade: 2007 ISD

Loblolly-Hammond:Build 230kV line:

2007 ISD

24

EGSI-LA Transmission Target Areas2009 and Beyond

Add 3rd 138/69 kV Scott Auto 100 MVA: 2009 ISD

25

Questions